Which muscle is descried as striated and involuntary
cardiac
Actin is
contractile protein that is called a thin filament
What forms cross bridges with actin
myosin
Pumping iron is most likely to cause
hypertrophy
The orbicularis oris muscle
surrounds the mouth
This muscle is not a facial muscle
sternocleidomastoid
This muscle is located on the posterior area of the body
latissimus dorsi
This group of muscles is located on the posterior thigh
hamstrings
The biceps femoris, semintendinous, and semimembranousus
are the hamstrings=semi
the rectus femoris, vastus latralis, vastus medialis, ad vastus intermedius
are the muscles of the quadriceps femoris
The quadriceps femoris group and the hamstrings
lie along the thigh
What flat muscle covers the forehead and raised the eyebrows ( for a "surprised" look).
frontalis
The levator palpebrae supeioris
raises (levor) the eyelids
The smiling muscle is the
zygomaticus
Which muscles are located between the ribs and help move the rib cage during breathing?
intercostal muscles
Which muscle is located in the lower extremities?
peroneus longus
This group of muscles moves the arm at the shoulder
rotator cuff muscles
The brachialis and brachioradialis
flex the arm at the elbow
This large muscle extends the thigh at the hip?
hamstring
This muscle attaches to the cranial aponeurosis and wrinkles the forehead
frontalis
make like a scarecrow by contracting this muscle
deltoid
This muscle lies along the anterior=biceps surface of the humerus and acts synergistically with the brachialis to flex the arm at the elbow.
biceps brachii
The gastrocnemius and the soleus are commonly called the
toe dancer's muscles
What is the name of cord of connective tissue that connects muscle to bone?
tendon
Which of the following is a series of contractile units that make up each myofibril; each unit extends from Z line to line
sarcomere
This structure is an extension of the sarcolemma or cell membrane; it penetrates the interior of the muscle and carries the electrical signal to the signal to the deepest part of the muscle
t-tubule
The sarcoplasmic reticulum
envelops the sarcomere-containing myofibrils
What is the site of calcium storage in a relaxed skeletal muscle?
sarcoplasmic reticulum
Actylcholine is released from the prejunctional membrane in response to the
nerve impulse
What is responsible for muscle relaxation
Calcium is pumped back into the sarcoplasmic reticulum
What describes a muscle that remains in a contracted state?
tetany=muscle relaxation
Joey has had his leg in a nonweight-bearing cast for 8 weeks. When the cast is removed, the leg appears smaller that the nonjured leg. Which terms best describes this observation?
disuse atrophy
Which muscle covers the shoulder like a shoulder pad?
deltoid
Which word refers to chest
pectoralis
This muscle is located in the upper back and posterior neck region; contraction of this muscle cause you to look up at the sky
trapezius
This muscle separates the thoracic and abdominal cavities and is also the chief breathing muscle
diaphragm
Which muscle are you using as you turn your head to the left and then to the right
sternocleidomastoid
These muscles are located on the inner (medial) surface of the thigh and move the thigh toward the midline of the body.
adductors
Where is the vastus lateralis located
thigh
What is the function of the masseter muscle
chews food
The Achilles tendon attaches the soleus and this muscle to the calcaneus
gastrocnemius
on which large muscle do you sit
gluteus maximus
the rectus, transversus, internal oblique, and the external oblique refer to
abdominal muscles
This muscle lies along the posterior surface of the upper am; it extends the forearm and is used to bear weight in crutch walking
triceps brachii
What increases the force of contraction of whole muscle
recruitment
The force of muscle contraction is most related to the
numbers of crossbridgs formed between actin and myosin
With regard to skeletal muscle contraction, which event comes first
release of neurotransmitter (ACh) from the somatic motor neuron
With regard to skeletal muscle contraction which event comes last
shortening of the sarcomere
which group is incorrect
contractile protein: thin filaments, myosin, aponeurosis
Which is incorrect
types of striated muscle: skeletal, cardiac, smooth
which group listed is incorrect
muscles involved in breathing: diaphragm, intercostals, hamstrings
Excess of ACh
spastic paralysis
Deficiency of ACh
flaccid paralysis